GEOLOGY OF THE CONNECTICUT VALLEY DISTRICT, 399 



large mills. Near the first dam below the upper bridge the dip is 6i° 

 S. 70° E. This is an excellent exposure of the soft, green schists, like 

 those described heretofore as belonging to the Coos group, with many 

 strings of white lime interstratified. At the bridge itself, the schists dip 

 6S° S. ^8° E. Above this the clay slates, with high easterly dips, succeed, 

 followed by quartzite and gneiss, whose details of position have been de- 

 scribed heretofore with sufficient minuteness. Trips to Cornish, over any 

 of the roads leading there from Claremont village, show occasional good 

 exposures of the soft, green schists, with easterly dips. They also occur 

 to the south-west, just encroaching upon the borders of Charlestown. 

 Near school-house No. 9 they dip about 65° S. 70° E. On the north- 

 west flank of Bible hill the dip is 63° S. 48° E. At W. Clark's a tougher 

 variety of the rock, making a ridge, dips 59° S. 42° E. At the edge of 

 the formation, near N. Stone's, the strike is N. 30° E., and the strata 

 nearly perpendicular. About school-house No. 16 the green schists are 

 very abundant. They likewise occur in many excavations for building 

 purposes within the limits of Claremont village. A review of the dips 

 about Claremont would indicate an anticlinal and a synclinal, the latter 

 inverted, in this area of Calciferous mica schist. The rock is believed to 

 be newer than either the schists on the west or the slates on the east 

 side of it in Claremont. 



On comparing together the positions of axes, it seems not improbable 

 that the Trisback anticlinal may run northerly to join that in the dis- 

 placed segment by the mills in Cornish, and thence north-easterly past 

 Meriden to East Lebanon and Hanover into another formation. The 

 direction of the axis being more easterly than that of the strata, it runs 

 off into the adjacent formations beyond East Plainfield. A comparison 

 of the dips with those in the gneiss of Enfield and Canaan, in the next 

 chapter, will show whether this line of elevation also affected the older 

 gneisses, and should therefore be regarded as occasioned by a very pow- 

 erful earth movement. 



T/ie Calciferous m Vermont. Hardly any group of strata occupies 

 more space than this in Vermont ; and as our thirteen sections across 

 that state, the continuation of those measured in New Hampshire, have 

 recently been reexamined, it seems proper briefly to refer to what has 

 been learned there respecting their formation. 



